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Video 7: Fix overscan and refresh rate in some modes.

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This commit is contained in:
OBattler
2025-08-14 00:25:40 +02:00
parent 6cc0b41dd5
commit f3ac0b38c2
1 changed files with 6 additions and 0 deletions
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6
src/video/vid_ht216.c
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@@ -698,12 +698,16 @@ ht216_recalctimings(svga_t *svga)
if (((ht216->ht_regs[0xc8] & HT_REG_C8_E256) || (svga->gdcreg[5] & 0x40)) && (!svga->lowres || (ht216->ht_regs[0xf6] & 0x80))) {
if (high_res_256) {
svga->hdisp >>= 1;
svga->dots_per_clock >>= 1;
svga->clock /= 2;
ht216->adjust_cursor = 1;
}
svga->render = svga_render_8bpp_highres;
} else if (svga->lowres) {
if (high_res_256) {
svga->hdisp >>= 1;
svga->dots_per_clock >>= 1;
svga->clock /= 2;
ht216->adjust_cursor = 1;
svga->render = svga_render_8bpp_highres;
} else {
@@ -726,6 +730,8 @@ ht216_recalctimings(svga_t *svga)
} else if (svga->bpp == 15) {
svga->rowoffset <<= 1;
svga->hdisp >>= 1;
svga->dots_per_clock >>= 1;
svga->clock /= 2;
if ((svga->crtc[0x17] & 0x60) == 0x20) /*Would result in a garbled screen with trailing cursor glitches*/
svga->crtc[0x17] |= 0x40;
svga->render = svga_render_15bpp_highres;